3.73 Putrescine, a substance produced by has the empirical formula C2H&N. Several determinations of molecular weight give values in the range of 87 to 90 amu. Find the molecular formula of putrescine decaying animals, 3.88 Using the following reaction (depicted using molecular models), large quantities of ammonia are burned in the presence of a platinum catalyst to give nitric oxide, as the first step in the preparation of nitric acid. Suppose a vessel contains 5.5 g of ammonia, how many grams of oxygen are needed for a complete reaction? 3.105 A sample of limestone (containing calcium carbonate, Caco,) weighing 438 mg is treated with oxalic acid, H2C204, to give calcium oxalate, CaC2O4. CacO3(s) + H2C;Oa(aq) → CaC;Oa(s) + H20() + CO2(g) The mass of the calcium oxalate produced is 469 mg. What is the mass percentage of (ans: 83.6%) calcium carbonate in this limestone?

3.73 Putrescine, a substance produced by has the empirical formula C2H&N. Several determinations of molecular weight give values in the range of 87 to 90 amu. Find the molecular formula of putrescine decaying animals, 3.88 Using the following reaction (depicted using molecular models), large quantities of ammonia are burned in the presence of a platinum catalyst to give nitric oxide, as the first step in the preparation of nitric acid. Suppose a vessel contains 5.5 g of ammonia, how many grams of oxygen are needed for a complete reaction? 3.105 A sample of limestone (containing calcium carbonate, Caco,) weighing 438 mg is treated with oxalic acid, H2C204, to give calcium oxalate, CaC2O4. CacO3(s) + H2C;Oa(aq) → CaC;Oa(s) + H20() + CO2(g) The mass of the calcium oxalate produced is 469 mg. What is the mass percentage of (ans: 83.6%) calcium carbonate in this limestone?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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